At first, dinosaurs seem like the product of a wild imagination – how could such weird and wonderful creatures ever have existed on our Earth? Before the extinction event that changed their world forever, dinosaurs and their reptilian relatives of the sea and sky ruled the prehistoric world. From Allosaurus to Zuniceratops, travel back in time to the age of the dinosaurs with the How It Works Book of Dinosaurs and discover the “terrible lizards” for yourself. We’ve gathered together some of the most amazing creatures and got right under their skins so we can demonstrate to you how they work. Did the Tyrannosaurus rex hunt or scavenge? Why did herbivores grow so massive? Find out how the dinosaurs survived and thrived, about the mass extinction that ended it all and what the dinosaurs left behind for us to find.